Table 3.
Multivariate Cox regression analysis of risk factors related to disease-free survival (DFS) and overall survival (OS) after propensity score matching.
| Characteristic | DFS | OS | ||||
|---|---|---|---|---|---|---|
| HR | 95% CI | P-value | HR | 95% CI | P-value | |
| Tumor classification | ||||||
| T1 | Ref | |||||
| T2 | 1.016 | (0.506–2.042) | 0.964 | |||
| T3 | 2.789 | (0.508–15.311) | 0.238 | |||
| LN metastasis | ||||||
| N0 | Ref | Ref | ||||
| N1 | 1.514 | (0.614–3.730) | 0.368 | 0.493 | (0.106–2.296) | 0.367 |
| N2 | 2.038 | (0.78–5.317) | 0.145 | 1.254 | (0.385–4.086) | 0.707 |
| N3 | 3.678 | (0.894–15.127) | 0.071 | 7.974 | (2.355–26.998) | 0.001 |
| Radiotherapy | ||||||
| Yes | 1.958 | (0.870–4.409) | 0.105 | |||
| No | Ref | |||||
| CAR | ||||||
| <0.029 | Ref | Ref | ||||
| ≥0.029 | 2.225 | (1.113–4.451) | 0.024 | 9.189 | (2.079–40.621) | 0.003 |
CAR – C-reactive protein to albumin ratio; OS – overall survival; DFS – disease-free survival; HR – hazard ratio; CI – confidence interval; LN – lymph node; ref – reference. Bold values indicate statistical significance.